<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区 -->
            <el-table :data="roleList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand" label="展开">
                    <template slot-scope="scope">
                        <el-row :key="itemOne.id" v-for="(itemOne, indexOne) in scope.row.children" :class="['bdbottom', indexOne === 0 ? 'bdtop' : '','vcenter']">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, itemOne.id)">{{itemOne.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 渲染二级权限 -->
                                <el-row :class="[indexTwo ===0 ? '' : 'bdtop','vcenter']" :key="indexTwo" v-for="(itemTwo, indexTwo) in itemOne.children">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, itemTwo.id)">{{itemTwo.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag :key="indexThree" v-for="(itemThree, indexThree) in itemTwo.children" type="warning" closable @close="removeRightById(scope.row, itemThree.id)">{{itemThree.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="序号"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="editRoleInfo">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="deleteRole(scope.row)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="rightDialogVisible" width="50%"
          @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" :default-expand-all="true" :default-checked-keys="defkeys" ref="treeRef">
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="rightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 角色编辑的对话框 -->
        <el-dialog
          title="角色编辑"
          :visible.sync="editRoleDialogVisible"
          width="50%">
          <span slot="footer" class="dialog-footer">
            <el-button @click="editRoleDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRoleDialogVisible = false">确 定</el-button>
          </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      roleList: [],
      // 选择是否隐藏分配权限对话框
      rightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选定的权限数组
      defkeys: [],
      roleId: '',
      // 编辑角色的对话框
      editRoleDialogVisible: false
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取失败')
      this.roleList = res.data
    },
    // 根据id删除对应的权限
    async removeRightById(role, rid) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('取消了删除')
      // 删除权限的操作
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rid}`)
      if (res.meta.status !== 200) return this.$message.error('删除权限失败')
      role.children = res.data
    },
    // 分配用户权限
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限数据失败')
      // 获取到的权限数据
      this.rightsList = res.data
      this.getLeafKeys(role, this.defkeys)
      this.rightDialogVisible = true
    },
    // 根据递归的形式获取角色的三级权限
    getLeafKeys(node, arr) {
      // 如果当前节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 监听分配权限的关闭事件
    setRightDialogClosed() {
      this.rightsList = []
    },
    // 分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.getRolesList()
      this.rightDialogVisible = false
    },
    // 角色的编辑(未做完)
    editRoleInfo() {
      this.editRoleDialogVisible = true
    },
    // 角色的删除
    async deleteRole(role) {
      const ref = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (ref !== 'confirm') {
        return this.$message.info('已取消选择')
      }
      const { data: res } = await this.$http.delete('roles/' + role.id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败')
      this.$message.success('删除角色成功')
      this.getRolesList()
    }
  }
}
</script>

<style lang="less" scoped>
  .el-tag {
      margin: 10px;
  }
  .bdtop {
      border-top: 1px solid #eee;
  }
  .bdbottom {
      border-bottom: 1px solid #eee
  }
  .vcenter {
      display: flex;
      align-items: center;
  }
</style>
